PENELOPE 2003 - OECD Nuclear Energy Agency

198 Chapter 6. Structure and operation of the code system
NBTL ... number of bins for track-length distributions of primary particles. Limits
of the interval where these distributions are tallied.
-- Defaults: NBTL=100, TLMIN=0, TLMAX=2.5*RANGE(EPMAX,KPARP,1)
ABSEN ... indicates a material M for which we require the code to tally the distribution
of absorbed energy (up to three different materials can be selected, a separate line
for each).
-- Default: off
DOSE2D ... the program will tally 2D, depth-radius, dose and deposited charge distributions
in the body KL, KC (i.e. the cylinder KC of layer KL). The numbers NZ
and NR of z- and r-bins have to be specified by the user, they must be between 1
and 100. Up to three different bodies can be selected, a DOSE2D line for each body.
-- Default: off
Note: The labels KL, KC that identify a given cylinder are defined by the ordering
in the input geometry list. These labels are written on the output geometry
report.
IFORCE ... activates forcing of interactions of type ICOL of particles KPAR in cylinder
KC of layer KL. FORCE is the forcing factor and WLOW, WHIG are the limits of the
weight window where interaction forcing is active.
-- Default: no interaction forcing
RESUME ... the program will read the dump file named filename1.ext (18 characters)
and resume the simulation from the point where it was left. Use this option
very, very carefully. Make sure that the input data file is fully consistent with the
one used to generate the dump file.
-- Default: off
DUMPTO ... generate a dump file named filename2.ext (18 characters) after completing
the simulation run. This allows resuming the simulation to improve statistics.
-- Default: off
NSIMSH ... desired number of simulated showers. Notice that NTOT is an INTEGER*4
value and, hence, it cannot exceed 2 31 − 1.
-- Default: NTOT=2147 million
RSEED ... seeds of the random number generator.
-- Default: ISEED1=12345; ISEED2=54321
TIME ... allotted simulation time, in sec.
-- Default: ITIME=100
The program PENCYL (as well as the other example MAIN programs) is aborted when
an incorrect input datum is found. The conflicting quantity usually appears in the last
line of the output file. If the trouble is with arrays having dimensions smaller than
required, the program indicates how the problem can be solved (this usually requires
editing the source file, be careful).
The example of input file given below belongs to the PENCYL file set included in the
distribution package. It corresponds to the simulation of a narrow photon beam with